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The combination of meperidine demerol , promethazine phenergan , and chlorpromazine thorazine , commonly called dpt, is no longer recommended because it has been shown to cause excessive depression of the central nervous system, extrapyramidal reactions, and prolonged recovery times buck, 2010; american academy of pediatrics, 1995 order 5mg kemadrin amex medicine numbers.

To ensure efficient urinary elimination of promethazine, you may want to take calcium-d-glucarate.

There have been case reports of promethazine abuse.